When using RCD functionality, the Solution Manager system needs to connect to SAP backend system via the Support Hub channel(usually configured via SAProuter)to check content notification and obtain the download URL. The download URL is then passed to the NWDS to download the content into Solution Manager system. NWDS needs to be able to connect to the specific internet download location "softwaredownloads.sap.com" where a direct internet connection or proxy connection is necessary.